Multiple-tool holder.



T. DAVIS.

MULTIPLE TOUL HOLDER.

APPLICATION FILED APR.28, 1914.

1,113,882. Patented ocu.. 13, 1914.

INVEN'POR WITNESSES:

ATTORNEY THE NORRIS PETERS CO..PHOT0 LITHO.. WASHINGTON. D. C.

Y TRAYI'IARN DAVIS, 0F OAKLAND, CALIFORNIA.

MULTIPLE-Toor. HOLDER.

Application inea 11111111 2s', 1914. `semaine. s311947.

Specification` of `Letters Patent.

ratentedoct. 13, 1914.

T0 @ZZ whom t may ooacemk i Be it known that I, TEAYTIAEN DAvrs, ma-

' chinist, a citizen'of the United States, residing at Oakland, in the county of Alameda and State of California, have invented'new and useful lImprovements in Multiple-'TOOL Holders, of which the following is a specification.

rlhis invention relates to a multiple tool holder which is particularly constructed!for` lathes. v

It is o-ne of the objects of the lpresentinvention to provide va simple, substantiah easily operated tool holderwhich is socon-`- structed that a multiple set of tools such as' are commonly used in a lathe may be supported and operated as ajsingle`unit,`thus permitting the finishing of an article with* out once removing'it from the centering spindles in the lathe.

lAnother object is to provide a novel means for bringing andholding the tool required into cutting position, and to provide means for adjusting the position of each individual tool.

Further objects will hereinafter appear. The invention consists of the parts and the construction and .combination of partsas hereinafter more fully described and claimed, having reference to the accompany;

ing drawings, in which- Figure 1 is a plan view of a single .mul-j tiple tool holder. Fig. 2 is a plan view of a double multiple tool holder partly in section. Fig. 3 is a side elevation of same.

Referring to the drawings7 A indicates the holder and B the multiple tool head. The holder proper may be either constructed as a single holder, as indicated in Fig. 1, or as a double holder, as indicated in Fig. 2. The

multiple tool head, referring to Figs. 2 and 3, is substantially circular in shape and is radially slotted, as at 2, 3, 4, 5, 6 and 7, to

receive various kinds and shapes of tools, as indicated at 2a, 33,4, 5a, 6a and 7a. The outer periphery of the tool head is preferably notched, as at 8, to provide seats for the set-screws 9 by which each individual tooly is secured in position. One side of the multiple tool head is provided with a central recess 10, with which the radial tool slots communicate. Supported within said recess is a secondary holder 11 which is also slotted, as indicated at 12, to permit each individual tool to project into the secondary holder 11. Mounted in the bottoni of the slot `is a set-screw These setfscrews are "provided for the purpose of 'adjusting theposition of eachindividualtool; in other words, anv adljustable stop 11s provided in thebottom of each slotagainst whichthe individual tools ,are supported. Projecting fromthe other side of theinultiplejtool head is a tapered shank 14, the outer end of which is threaded, as at 15, and surrounding said shank and formed integral with the head is an annular" l flange projection 161which is radially peru foratedas`at`j17, the number of perforations corresponding `to the number of tools used.

' The outer end of holder B is provided with a conical-shaped opening 18v vwhich is adapted to receive the shank`14 and is si1nilarly provided with an annular recess or groove 19 into which flange 16 may project; aV suitable formof nut 2O being provided for the purpose of securing shank 14, with connected tool head, in position. `Connnunicat'- i.

ing withtheannular groove 19 is a radially disposed perforation 21 through which a pin 22 may be inserted for `the purpose of locking the toolhead againstperipheral Inovement., j

In actual operation, after having finished a cut with a certain tool, and when it is de` sired to movea second tool intooperative position, it is only necessary to slacken up on nut 20.v The pin 22 is then removed and the tool head is 'thus free to be turned until .the required tool hasbeen turned into posi" tion; vthe eXactposition being secured when thecorresponding perforation 17 is brought into register `with the perforation 21. Pin 22 is then inserted and the nut 2O again tightened. The correct positionof the cutting tool, with relation to the work, is thus always secured, and the tool is furthermore solidly clamped and held in position both by the pin 22 and the nut 20.

` The" double tool holder may be used to great advantage as two cuts can be taken at one time. The double tool holder also provides a more substantial support, as the holder B must necessarily be heavier in con struction than where a single tool head is used. The single tool holder may sometimes be used to advantage over a double tool holder as the other end of same may be angularly disposed, as indicated in Fig. 1, thus i lpermitting the tool to be brought on a direct line with the center of the holder. The construction is otherwise substantially similar. A single or double multiple tool holder o ence and .Where the lathe is provided With an auto-` matic stop. v

The materials and finish of the several parts of the` device are such as the experijudgmentof the manufacturer maydictate. l I Wish it understood that various changes 4in form, proportions and `minor details of` construction may be resorted to Within the- .scopeof the appended claims, and that I dov not Wish to limit myself to the specific de; sign and construction here shown.

Having thus described lmy invention, what r,I- claim and desire to secure by Letters Patent is 17. In a multiple tool holder, the combi-I nation of a holder having an enlargement formed on its outer end with an annular groove cut in the face thereof, a circulartool head carried by the enlarged end of the holder and turnable therein, a plurality ofradially disposed tools secured in the tool head, yanannular flange formed on the inner face' of the tool head and adapted to project i l into the annular groove on the holder, said flange having a plurality'of perforations eX- tending therethrough, one perforation opposite each tool, a pin insertible through the holder and any of said perforations to lock any selected tool in position, slots formed in the tool head in Which the tools are mounted, means for securing the tools Y in ltheir respective slots, a secondary holder centrally mounted-in the tool head, and a plurality of set-screws carried by the secondary holder to form an adjustable stop for each tool.

2. In a multiple tool holder, the combination of a holder, a tool head having a plurality of radially disposed slots formed therein turnably mounted on the holder, means for locking the head against turning movement, a tool ,in each slot, a secondary 'holder centrally mounted in the tool head having slots formed therein into which the inner end of each tool is adapted to project, and a plurality of set-screws carried by the secondary holder, one for each slot.

3. In a multiple tool holder, the combination ofra holder, a tool head having a plurality of radially disposed slots formed therein vturnably mounted on the holder, means for locking the head against turning movement, a tool in each slot, a secondary holder centrally mounted in the tool head having slots formed therein into which the inner end of each tool is adapted -to project, a plurality of set-slcrews carried by the secondary holder, one for each slot, and means on the head for locking each tool.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

TRAYHARN DAVIS. Witnesses JOHN A. DAVIS,

WILLIAM C. FLETCHER.

Copies of this patent may be obtained for five cents cach, by addressing the Washington, D. C.

Commissioner of Patents, 

